-er c-- ccc cce ccf ccm cco ccr ccs cct ce- cec cee cef cem ceo cer ces cet cfc cfe cff cfm cfo cfr cfs cft cmc cme cmf cmm cmo cmr cms cmt co- coc coe cof com coo cor cos cot crc cre crf crm cro crr crs crt csc cse csf csm cso csr css cst ctc cte ctf ctm cto ctr cts ctt ec- ecc ece ecf ecm eco ecr ecs ect eec eee eef eem eeo eer ees eet ef- efc efe eff efm efo efr efs eft em- emc eme emf emm emo emr ems emt eo- eoc eoe eof eom eoo eor eos eot erc ere erf erm ero err ers ert es- esc ese esf esm eso esr ess est etc ete etf etm eto etr ets ett fcc fce fcf fcm fco fcr fcs fct fec fee fef fem feo fer fes fet ffc ffe fff ffm ffo ffr ffs fft fmc fme fmf fmm fmo fmr fms fmt foc foe fof fom foo for fos fot frc fre frf frm fro frr frs frt fsc fse fsf fsm fso fsr fss fst ftc fte ftf ftm fto ftr fts ftt m-f m-o m-r mc- mcc mce mcf mcm mco mcr mcs mct mec mee mef mem meo mer mes met mfc mfe mff mfm mfo mfr mfs mft mmc mme mmf mmm mmo mmr mms mmt moc moe mof mom moo mor mos mot mrc mre mrf mrm mro mrr mrs mrt msc mse msf msm mso msr mss mst mtc mte mtf mtm mto mtr mts mtt oc- occ ocf ocm oco ocr ocs oct oec oee oef oem oeo oer oes oet of- ofc ofe off ofm ofo ofr ofs oft om- omc ome omf omm omo omr oms omt oo- ooc oof oom ooo oor oos oot or- orc ore orf orm oro orr ors ort os- osc ose osf osm oso osr oss ost ot- otc ote otf otm oto otr ots ott rcc rce rcf rcm rco rcr rcs rct re- rec ree ref rem reo rer res ret rfc rfe rff rfm rfo rfr rfs rft rmc rme rmf rmm rmo rmr rms rmt roc roe rof rom roo ror ros rot rrc rrf rrm rrr rrs rrt rsc rse rsf rsm rso rsr rss rst rtc rte rtf rtm rto rtr rts rtt scc sce scf scm sco scr scs sct se- sec see sef sem seo ser ses set sfc sfe sff sfm sfo sfr sfs sft smc sme smf smm smo smr sms smt soc soe sof som soo sor sos sot sr- src sre srf srm sro srr srs srt ss- ssc sse ssf ssm sso ssr sss sst stc ste stf stm sto str sts stt tcc tce tcf tcm tco tcr tcs tct te- tec tee tef tem teo ter tes tet tfc tfe tff tfm tfo tfr tfs tft tmc tme tmf tmm tmo tmr tms tmt to- toc toe tof tom too tor tos tot trc tre trf trm tro trr trs trt tsc tse tsf tsm tso tsr tss tst ttc tte ttf ttm tto ttr tts ttt